JDC Electronic SA SalinoMADD - Manual (Page 12)

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MADD Technologies sàrl
– Avenue des Sports 42 – CH-1400 Yverdon-les-Bains – Switzerland
Tel: +41 24 445 31 16 – Fax: +41 24 445 21 23 – Email: [email protected] – www.madd.ch
G G a a u u g g i i n n g g a a c c q q u u i i s s i i t t i i o o n n o o n n s s i i t t e e
Before starting the acquisition
Before launching the acquisition, select the site and its indications (see above).
Make sure that the probe has reached the water's temperature before starting the data acquisition. The water
salinity is directly dependent on the water temperature which is measured to correct the salinity and thus bring
it to a standard 20° C. Just use the MULTIMETRE mode to control the temperature stability.
Beginning of data acquisition
After the START of the acquisition, the SalinoMADD begins the
measurements according to the programmed interval. At each
measurement, salinity and water temperature values are displayed
on screen. These measurements are checked to detect the arrival of
the salt cloud.
For correct operation, the device should do at least 100
measurements before the arrival of the salt cloud.
Then both following situations may appear:
• The first one occurs when the salt cloud arrives between the 100 th and the 240 th measurement. In this
case, the device records the initial salinity before the arrival of the salt cloud. It will also record the
memory address of the start. It then continues recording the data.
• The second situation appears when more than 240 measurements having been recorded and that the salt
cloud has not arrived yet. In this case, the SalinoMADD, in order to prevent wasting memory space, will
delete the oldest measurements and record the new ones. As soon as the salt cloud is detected, the
memory address of the start and initial salinity are memorized and the data acquisition continues normally.
As soon as the salt cloud has been detected, the display shown here
appears. Instead of the now useless temperature indication, the
initial salinity IS is displayed. At the end of the acquisition procedure,
the salinity should have reached again this initial value. The value on
the left (M .Nr = 468) indicates the number of measurements
already recorded while the value on the right (REM = 487) shows the
number of remaining measurements. Current date and time are
shown on the fourth line.
End of data acquisition
During the rest of the procedure, the SalinoMADD will try to detect the end of the salt cloud. The operator will
follow the evolution as well. When the water salinity come back to its initial value, the display will normally say
END OF CLOUD - STOP:
. The operator will ensure that the salinity has dropped to its initial value. If so he
can stop the procedure as indicated on the display. If not, he will
await the end of the salt cloud before stopping. The SalinoMADD
does not switch off automatically unless the memory of the site in
question is exhausted. At this moment or when pressing touch
,
the memory address of the end the cloud, the values of the initial,
maximum and final salinity and the exact time at the end of the
gauging are recorded in the memory of the site. At the end of the
measuring procedure, the results are displayed.